This paper investigates the mechanical properties of plasma-sprayed Al2O3-TiO2 coatings. Micro and nano powders were deposited on hot and cold substrates under different conditions using atmospheric and vacuum plasma spraying. The coatings were then characterized based on microstructure, hardness, phase composition, abrasive wear rate, and adhesion strength. It is observed that Al2O3-TiO2 layers are very dependent on the coating system, powder form, and spray parameters used. The layers sprayed with nanopowder in a vacuum were found to have the best combination of properties. Paper includes a German-language abstract.
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Issue Section:Low-Pressure and Reactive Plasma Spraying Processes